merged branch stloyd/feature/form-labels (PR #6262)

This PR was merged into the master branch.

Commits
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d5426f0 [Form] Add tests to prove that label is not rendered when is marked as false
120547c [Form][TwigBridge] Don't set label attributes if is marked as not to be rendered [Form][FrameworkBundle] Add option to disable rendering of label for fields
36e4556 [Form] Option for not displaying a label by setting label to false. [Form] Fixed formatting & translation ..

Discussion
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[Form] Added option for not displaying a form-label by setting label to false

Bug fix: no
Feature addition: yes
Backwards compatibility break: no
Symfony2 tests pass: yes
Replaces: #5421

@fabpot @BenjaminBeck: I was just not sure what to do with "table based" forms, so I left `<td></td>` rendered when there is no label, because I'm not sure that we can hide it easily.

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by XWB at 2012-12-11T09:30:14Z

:+1:

Author: fabpot

Resources/views/Form/form_label.html.php

@@ -1,4 +1,6 @@
+<?php if (false !== $label): ?>
 <?php if ($required) { $label_attr['class'] = trim((isset($label_attr['class']) ? $label_attr['class'] : '').' required'); } ?>
 <?php if (!$compound) { $label_attr['for'] = $id; } ?>
 <?php if (!$label) { $label = $view['form']->humanize($name); } ?>
 <label <?php foreach ($label_attr as $k => $v) { printf('%s="%s" ', $view->escape($k), $view->escape($v)); } ?>><?php echo $view->escape($view['translator']->trans($label, array(), $translation_domain)) ?></label>
+<?php endif ?>